So far we have successfully constructed a novel system in which bacterial colonies will automatically divide into two parts after certain time. Over the summer we have been working on assembling riboswitches (to Modules/Riboswitch) finely tuned by small molecules, which will act as the main power to drive two parts away from each other, and toggle switches (to Modules/Toggle-switch) pushed on and off while memorizing current state, which will play the role of giving birth to two ‘different’ kinds of bacteria in one colony.